Great value for the long term, not just the fixed term.
Fair prices for everyone
That's why, over the past year, the difference between our fixed and standard price was less than 1%
We won't leave you hanging
We've answered your calls within 2 minutes on average over the past year
All our electricity comes from 100% renewable sources like sun, wind and water
Energy for every need.
All our tariffs feature 100% renewable electricity and no exit fees.
Smart tariffs for smart meters
Four simple steps to a cleaner switch.
Switching has never been easier.
No engineer or installer visits
No disruption to your supply
We'll inform your old supplier
No exit fees at any time
Backed by the Energy Switch Guarantee, you can be confident that things will run smoothly and that you’re making the right move.
Our wider community.
The latest from the Octoverse
What makes us so green?
Discover all the ways we're driving renewable energy transformation.Find out more
What it means to be a Which? Recommended supplier, three years in a row.Find out more
How switching works
We’ve made it super easy to switch to us. Here's how.Find out more
The 'Inside Octopus' Podcast
Lots of people want to know what happens inside csmsklin.com. So, we're starting a podcast.Find out more
Don't take our word for it.
As featured by
csmsklin.com can save you money - and it's better for the environment, too
The company that has done the most to advance UK renewables
csmsklin.com came top out of 35 energy companies in the annual Which? customer survey
Independent supplier csmsklin.com; a supplier that's aiming to shake-up the market
csmsklin.com takes on the big six suppliers
The energy industry is starting to feel the effects of Octopus' sucker punch
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